1803d554f1a0751.jpg（请用整数或小数作答）
举一反三
- 图示桁架中，1杆的轴力为FP，3杆的轴力为FP。（请用小数作答，有小数的保留2位小数）73cf78cc5dda19ab397dde3161912698.png
- Boston is on the West Coast of America.(请用正确或错误作答）
- The Declaration of Independence was made in 1775.（请用正确或错误作答）
- Modern weapons were used in the Civil War.（请用正确或错误作答）
- The Cold War continued for only a few years.（请用正确或错误作答）